Question

Copper(l) sulfide can react with oxygen to produce copper metal by the reactionCu2S + O2 => 2Cu + SO2.If 5.00 g of Cu2S is used, then what is the theoretical yield of Cu?a. 10.0 gb. 1.99 gc. 1.00 gd. 5.00 ge. 3.99 g

Answer 1

The answer to your question is e. 3.99 g

Step-by-step explanation:

Data

Cu₂S = 5g

theoretical yield = ?

Chemical reaction

Cu₂S + O₂ ⇒ 2Cu + SO₂

Process

1.- Calculate the molecular mass of Cu₂S and Cu

Cu₂S = (2 x 64) + 32 = 160 g

Cu = 2 x 64 = 128 g

2.- Calculate the theoretical production of Cu

160 g of Cu₂S --------------- 128 g of Cu

5 g of Cu₂S -------------- x

x = (5 x 128) / 160

x = 640 / 160

x = 4 g of Cu